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20 April 2024 |
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Article overview
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Newly observed $a_0(1817)$ as the scaling point of constructing the scalar meson spectroscopy | | Dan Guo
; Wei Chen
; Hua-Xing Chen
; Xiang Liu
; Shi-Lin Zhu
; | | Date: |
27 Apr 2022 | | Abstract: | Stimulated by the newly observed $a_0(1817)$ by the BESIII Collaboration, we
find a perfect Regge trajectory composed of the $a_0(980)$, $a_0(1450)$, and
$a_0(1817)$, which leads us to categorize the $a_0(980)$, $a_0(1450)$, and
$a_0(1817)$ into the isovector scalar meson family. This scenario is supported
by their two-body Okubo-Zweig-Iizuka allowed strong decay behaviors. In this
scheme, we also predict the third radial excitation of the $a_0(980)$, which is
denoted as the $a_0(2115)$, accessible at future experiment as a direct test of
this assignment. We find another Regge trajectory which contains three
isoscalar scalar states $f_0(980)$, $X(1812)$, and $f_0(2100)$. We investigate
their two-body Okubo-Zweig-Iizuka allowed strong decay patterns, which are
roughly consistent with the experimental data. The $f_0(980)$, $X(1812)$, and
$f_0(2100)$ can be well grouped into the isoscalar scalar meson family. We want
to emphasize that these two Regge trajectories have a similar slope. In
summary, the present work provides a scheme of constructing the scalar meson
family based on these reported scalar states. The possibility of the
$f_0(1710)$ as the candidate of the scalar glueball cannot be excluded by the
observation of the $a_0(1817)$ since the $a_0(1817)$ is more suitable as the
isovector partner of the $X(1812)$. | | Source: | arXiv, 2204.13092 | | Services: | Forum | Review | PDF | Favorites | |
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